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FilledSmallSquare x + y + z represents a sum of terms.

FilledSmallSquare Plus has attributes Flat, Orderless and OneIdentity.

FilledSmallSquare The default value for arguments of Plus, as used in x_. patterns, is 0.

FilledSmallSquare Plus[ ] is taken to be 0.

FilledSmallSquare Plus[x] is x.

FilledSmallSquare x + 0 evaluates to x, but x + 0.0 is left unchanged.

FilledSmallSquare Unlike other functions, Plus applies built-in rules before user-defined ones. As a result, it is not possible to make definitions such as 2+2=5.

FilledSmallSquare See Section 1.1.1.

FilledSmallSquare See also: Minus, Subtract, AddTo, Increment, Total.

FilledSmallSquare New in Version 1; modified in 3.

Further Examples